Also known as Stringent starvation protein B homolog (Adapter protein SspB) (Specificity-enhancing factor SspB).Enhances recognition of ssrA-tagged proteins by the ClpX-ClpP protease; the ssrA degradation tag (AANDENYALAA) is added trans-translationally to proteins that are stalled on the ribosome, freeing the ribosome and targeting stalled peptides for degradation. SspB activates the ATPase a

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ctivity of ClpX. Seems to act in concert with SspA in the regulation of several proteins during exponential and stationary-phase growth ().